I have a Royal tank just like the one pictured-and a couple others.Truely GREAT machines-about the most powerful canister out there-but a disadvantge of these machines-their jet engine like exhaust!it can blow stuff around in the room-or dust that you haven't picked up.and YOU MUST use the yellow multilayer bags in these machines--the single layer bags the powerful suction of these vacs pulls the dust RIGHT THROUGH the bag!But these vacuums are FAR BETTER than the "Frozen Turkey" plastic canisters made by TTI Royal today.One vac shop I bought one of these machines from says the motor is the same as used in some central vacs.Now if an exhaust-diffuser can be made for these-than PERFECT!Another person I knew of used one the these in her home cleaning service.Long Live the ROYAL TORPEDO vacuum!